目的ATP结合盒B亚家族成员1(ATP binding cassette subfamily B member 1,ABCB1)的异常表达在多种癌症的发生发展中发挥关键作用。然而,G蛋白偶联受体C家族5组A型(G protein coupled receptor family C group5 type A,GPRC5A)调控的ABCB...目的ATP结合盒B亚家族成员1(ATP binding cassette subfamily B member 1,ABCB1)的异常表达在多种癌症的发生发展中发挥关键作用。然而,G蛋白偶联受体C家族5组A型(G protein coupled receptor family C group5 type A,GPRC5A)调控的ABCB1表达对肺腺癌增殖的影响仍不清楚。本研究探讨了GPRC5A调控的ABCB1表达对肺腺癌增殖的影响。方法我们采用RT-PCR、Western-blot或免疫组化实验,分析ABCB1在肺腺癌细胞系、人肺腺癌组织以及GPRC5A基因敲除小鼠和野生型小鼠的气管上皮细胞和肺组织中的表达。采用细胞计数试剂盒-8(CCK-8)分析GPRC5A基因敲除小鼠气管上皮细胞对化疗药物的敏感性。采用皮下肿瘤形成实验探讨下调ABCB1表达是否可抑制体内肺腺癌增殖。采用免疫荧光和免疫沉淀实验研究GPRC5A和ABCB1之间潜在的调控关系。结果ABCB1在肺腺癌细胞系和人类肺腺癌组织中表达上调。GPRC5A基因敲除小鼠的气管上皮细胞及肺组织的ABCB1表达高于野生型小鼠。与GPRC5A野生型小鼠的气管上皮细胞相比,GPRC5A基因敲除小鼠的气管上皮细胞对塔立奇达和多柔比星更敏感。注射移植细胞28天后,接受ABCB1基因敲除细胞移植的GPRC5A-/-C57BL/6小鼠的肺肿瘤的体积和重量均明显低于野生型细胞移植小鼠(P=0.0043,P=0.0060)。此外,免疫荧光和免疫沉淀实验表明,GPRC5A通过直接结合方式调控ABCB1的表达。结论GPRC5A通过抑制ABCB1表达降低肺腺癌增殖。GPRC5A调节ABCB1表达的途径有待研究。展开更多
目的探讨S期激酶相关蛋白2(S-phase kinase interacting protein 2,Skp2)与三磷酸腺苷结合蛋白G亚族成员2(ATP-binding cassette sub-family G member 2,ABCG2)在鼻咽癌组织中的表达水平,及其与临床病理因素的关系。方法收集2013-01-12-...目的探讨S期激酶相关蛋白2(S-phase kinase interacting protein 2,Skp2)与三磷酸腺苷结合蛋白G亚族成员2(ATP-binding cassette sub-family G member 2,ABCG2)在鼻咽癌组织中的表达水平,及其与临床病理因素的关系。方法收集2013-01-12-2014-03-30,韶关市粤北人民医院耳鼻喉科行病理活检的63例鼻咽癌组织及20例正常鼻黏膜组织,采用免疫组织化学染色检测Skp2和ABCG2蛋白的表达,统计分析Skp2和ABCG2蛋白表达间及与肿瘤临床病理因素间的相关性。结果在鼻咽癌组织中,Skp2蛋白阳性表达率为74.6%(47/63),ABCG2为61.9%(39/63),均较正常鼻黏膜组织的20.0%(4/20)和15.0%(3/20)显著升高,P值均<0.001。在鼻咽癌组织中,Skp2和ABCG2蛋白表达呈显著正相关关系,r=0.751,P<0.001。高表达Skp2和ABCG2蛋白与肿瘤淋巴结转移(P值分别为0.003和<0.001)及高TNM分期(P值分别为0.003和0.013)呈显著正相关。结论 Skp2和ABCG2蛋白在鼻咽癌组织中表达上调,并与肿瘤恶性临床病理特征有关。Skp2和ABCG2蛋白可能成为鼻咽癌早期诊断的重要标志物及生物靶向治疗的有效靶点之一。展开更多
Atherosclerosis is the major complication of diabetes and has become a major issue in the provision of medical care.In particular the economic burden is growing at an alarming rate in parallel with the increasing worl...Atherosclerosis is the major complication of diabetes and has become a major issue in the provision of medical care.In particular the economic burden is growing at an alarming rate in parallel with the increasing worldwide prevalence of diabetes.The major disturbance of lipid metabolism in diabetes relates to the effect of insulin on fat metabolism.Raised triglycerides being the hallmark of uncontrolled diabetes,i.e.,in the presence of hyperglycaemia.The explosion of type 2 diabetes has generated increasing interest on the aetiology ofatherosclerosis in diabetic patients.The importance of the atherogenic properties of triglyceride rich lipoproteins has only recently been recognised by the majority of diabetologists and cardiologists even though experimental evidence has been strong for many years.In the post-prandial phase 50% of triglyceride rich lipoproteins come from chylomicrons produced in the intestine.Recent evidence has secured the chylomicron as a major player in the atherogenic process.In diabetes chylomicron production is increased through disturbance in cholesterol absorption,in particular Neimann Pick C1-like1 activity is increased as is intestinal synthesis of cholesterol through 3-hydroxy-3-methyl glutaryl co enzyme A reductase.ATP binding cassette proteins G5 and G8 which regulate cholesterol in the intestine is reduced leading to chylomicronaemia.The chylomicron particle itself is atherogenic but the increase in the triglyceride-rich lipoproteins lead to an atherogenic low density lipoprotein and low high density lipoprotein.The various steps in the absorption process and the disturbance in chylomicron synthesis are discussed.展开更多
结肠癌的诊断及治疗一直是医疗界的难题。近年有关结肠癌差异蛋白质的研究越来越多,运用蛋白质组学技术发现癌症组织中的差异蛋白质,并研究其在癌症中的功能及作用,从而用于癌症的诊断和治疗,已成为一种新的趋势。本课题组前期通过蛋白...结肠癌的诊断及治疗一直是医疗界的难题。近年有关结肠癌差异蛋白质的研究越来越多,运用蛋白质组学技术发现癌症组织中的差异蛋白质,并研究其在癌症中的功能及作用,从而用于癌症的诊断和治疗,已成为一种新的趋势。本课题组前期通过蛋白质组学技术发现乳腺癌相关耐药蛋白2(ATP-binding cassette sub-family G member 2,ABCG2)和蛋白质二硫异构酶A2(protein disulfide-isomerase A2,PDIA2)两种结肠癌差异蛋白质,本文对这两种蛋白质在结肠癌中的表达及功能作一综述。展开更多
文摘目的ATP结合盒B亚家族成员1(ATP binding cassette subfamily B member 1,ABCB1)的异常表达在多种癌症的发生发展中发挥关键作用。然而,G蛋白偶联受体C家族5组A型(G protein coupled receptor family C group5 type A,GPRC5A)调控的ABCB1表达对肺腺癌增殖的影响仍不清楚。本研究探讨了GPRC5A调控的ABCB1表达对肺腺癌增殖的影响。方法我们采用RT-PCR、Western-blot或免疫组化实验,分析ABCB1在肺腺癌细胞系、人肺腺癌组织以及GPRC5A基因敲除小鼠和野生型小鼠的气管上皮细胞和肺组织中的表达。采用细胞计数试剂盒-8(CCK-8)分析GPRC5A基因敲除小鼠气管上皮细胞对化疗药物的敏感性。采用皮下肿瘤形成实验探讨下调ABCB1表达是否可抑制体内肺腺癌增殖。采用免疫荧光和免疫沉淀实验研究GPRC5A和ABCB1之间潜在的调控关系。结果ABCB1在肺腺癌细胞系和人类肺腺癌组织中表达上调。GPRC5A基因敲除小鼠的气管上皮细胞及肺组织的ABCB1表达高于野生型小鼠。与GPRC5A野生型小鼠的气管上皮细胞相比,GPRC5A基因敲除小鼠的气管上皮细胞对塔立奇达和多柔比星更敏感。注射移植细胞28天后,接受ABCB1基因敲除细胞移植的GPRC5A-/-C57BL/6小鼠的肺肿瘤的体积和重量均明显低于野生型细胞移植小鼠(P=0.0043,P=0.0060)。此外,免疫荧光和免疫沉淀实验表明,GPRC5A通过直接结合方式调控ABCB1的表达。结论GPRC5A通过抑制ABCB1表达降低肺腺癌增殖。GPRC5A调节ABCB1表达的途径有待研究。
文摘目的探讨S期激酶相关蛋白2(S-phase kinase interacting protein 2,Skp2)与三磷酸腺苷结合蛋白G亚族成员2(ATP-binding cassette sub-family G member 2,ABCG2)在鼻咽癌组织中的表达水平,及其与临床病理因素的关系。方法收集2013-01-12-2014-03-30,韶关市粤北人民医院耳鼻喉科行病理活检的63例鼻咽癌组织及20例正常鼻黏膜组织,采用免疫组织化学染色检测Skp2和ABCG2蛋白的表达,统计分析Skp2和ABCG2蛋白表达间及与肿瘤临床病理因素间的相关性。结果在鼻咽癌组织中,Skp2蛋白阳性表达率为74.6%(47/63),ABCG2为61.9%(39/63),均较正常鼻黏膜组织的20.0%(4/20)和15.0%(3/20)显著升高,P值均<0.001。在鼻咽癌组织中,Skp2和ABCG2蛋白表达呈显著正相关关系,r=0.751,P<0.001。高表达Skp2和ABCG2蛋白与肿瘤淋巴结转移(P值分别为0.003和<0.001)及高TNM分期(P值分别为0.003和0.013)呈显著正相关。结论 Skp2和ABCG2蛋白在鼻咽癌组织中表达上调,并与肿瘤恶性临床病理特征有关。Skp2和ABCG2蛋白可能成为鼻咽癌早期诊断的重要标志物及生物靶向治疗的有效靶点之一。
文摘Atherosclerosis is the major complication of diabetes and has become a major issue in the provision of medical care.In particular the economic burden is growing at an alarming rate in parallel with the increasing worldwide prevalence of diabetes.The major disturbance of lipid metabolism in diabetes relates to the effect of insulin on fat metabolism.Raised triglycerides being the hallmark of uncontrolled diabetes,i.e.,in the presence of hyperglycaemia.The explosion of type 2 diabetes has generated increasing interest on the aetiology ofatherosclerosis in diabetic patients.The importance of the atherogenic properties of triglyceride rich lipoproteins has only recently been recognised by the majority of diabetologists and cardiologists even though experimental evidence has been strong for many years.In the post-prandial phase 50% of triglyceride rich lipoproteins come from chylomicrons produced in the intestine.Recent evidence has secured the chylomicron as a major player in the atherogenic process.In diabetes chylomicron production is increased through disturbance in cholesterol absorption,in particular Neimann Pick C1-like1 activity is increased as is intestinal synthesis of cholesterol through 3-hydroxy-3-methyl glutaryl co enzyme A reductase.ATP binding cassette proteins G5 and G8 which regulate cholesterol in the intestine is reduced leading to chylomicronaemia.The chylomicron particle itself is atherogenic but the increase in the triglyceride-rich lipoproteins lead to an atherogenic low density lipoprotein and low high density lipoprotein.The various steps in the absorption process and the disturbance in chylomicron synthesis are discussed.
文摘结肠癌的诊断及治疗一直是医疗界的难题。近年有关结肠癌差异蛋白质的研究越来越多,运用蛋白质组学技术发现癌症组织中的差异蛋白质,并研究其在癌症中的功能及作用,从而用于癌症的诊断和治疗,已成为一种新的趋势。本课题组前期通过蛋白质组学技术发现乳腺癌相关耐药蛋白2(ATP-binding cassette sub-family G member 2,ABCG2)和蛋白质二硫异构酶A2(protein disulfide-isomerase A2,PDIA2)两种结肠癌差异蛋白质,本文对这两种蛋白质在结肠癌中的表达及功能作一综述。
